Tools › PDF Tools › Merge PDF
Merge PDF Files Online — Free
Drag in up to 5 PDFs, arrange them in order, and download one merged file. No account, no watermark, nothing stored.
Drop PDFs here or browse
Up to 5 files · Max 20 MB each · PDF only
Add at least 2 PDFs to begin.
Your merged PDF is ready.
About Merge PDF
Combine any number of PDF files into a single document — no account, no watermark, nothing installed. Upload up to 5 PDFs, drag them into the order you want, and click Merge. Your file is processed server-side via Ghostscript and ready for download in seconds.
Unlike SaaS tools that throttle free users or require email sign-up, AT USE imposes no daily limits and stores nothing past 30 minutes. The merged PDF contains the exact content from your input files.
How to merge PDFs online
- Upload your PDFs — drop up to 5 files onto the upload zone or click Browse.
- Arrange the order — drag the handle next to each file to set the output page order.
- Click Merge PDFs. Processing happens server-side via Ghostscript.
- Download your merged file — no sign-in, no watermark, no stored data after 30 min.
How many PDFs can I merge at once?
Up to 5 PDFs per merge, each up to 20 MB. For larger sets, merge in batches and combine the resulting files.
Is Merge PDF free?
Yes — no account, no watermark, no daily limit. AT USE is free for everyone.
Are my files stored after merging?
Files are automatically deleted from our servers within 30 minutes of processing. Nothing is retained beyond your session.
What if my PDF is password-protected?
Password-protected PDFs cannot be merged. Remove the password first with a PDF unlock tool, then merge.
Can I merge PDFs on mobile?
Yes — the tool works on all devices. On mobile, tap and hold a file handle to drag and reorder PDFs.